minix/lib/libc/stdio/local.h

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/* $NetBSD: local.h,v 1.34 2012/03/27 15:05:42 christos Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)local.h 8.3 (Berkeley) 7/3/94
*/
#include "wcio.h"
#include "fileext.h"
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
/*
* Information local to this implementation of stdio,
* in particular, macros and private variables.
*/
extern int __sflush(FILE *);
extern FILE *__sfp(void);
extern void __sfpinit(FILE *);
extern int __srefill(FILE *);
extern ssize_t __sread(void *, void *, size_t);
extern ssize_t __swrite(void *, const void *, size_t);
extern off_t __sseek(void *, off_t, int);
extern int __sclose(void *);
extern void __sinit(void);
extern void _cleanup(void);
extern void (*__cleanup)(void);
extern void __smakebuf(FILE *);
extern int __swhatbuf(FILE *, size_t *, int *);
extern int _fwalk(int (*)(FILE *));
extern char *_mktemp(char *);
extern int __swsetup(FILE *);
extern int __sflags(const char *, int *);
extern int __svfscanf(FILE * __restrict, const char * __restrict,
va_list) __scanflike(2, 0);
extern int __svfscanf_unlocked(FILE * __restrict, const char * __restrict,
va_list) __scanflike(2, 0);
extern int __vfprintf_unlocked(FILE * __restrict, const char * __restrict,
va_list) __printflike(2, 0);
extern int __sdidinit;
extern int __gettemp(char *, int *, int);
extern wint_t __fgetwc_unlock(FILE *);
extern wint_t __fputwc_unlock(wchar_t, FILE *);
extern ssize_t __getdelim(char **__restrict, size_t *__restrict, int,
FILE *__restrict);
extern char *__fgetstr(FILE * __restrict, size_t * __restrict, int);
extern int __vfwprintf_unlocked(FILE *, const wchar_t *, va_list);
extern int __vfwscanf_unlocked(FILE * __restrict,
const wchar_t * __restrict, va_list);
/*
* Return true iff the given FILE cannot be written now.
*/
#define cantwrite(fp) \
((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
__swsetup(fp))
/*
* Test whether the given stdio file has an active ungetc buffer;
* release such a buffer, without restoring ordinary unread data.
*/
#define HASUB(fp) (_UB(fp)._base != NULL)
#define FREEUB(fp) { \
if (_UB(fp)._base != (fp)->_ubuf) \
free((char *)_UB(fp)._base); \
_UB(fp)._base = NULL; \
}
/*
* test for an fgetln() buffer.
*/
#define FREELB(fp) { \
free(_EXT(fp)->_fgetstr_buf); \
_EXT(fp)->_fgetstr_buf = NULL; \
_EXT(fp)->_fgetstr_len = 0; \
}
extern void __flockfile_internal(FILE *, int);
extern void __funlockfile_internal(FILE *, int);
/*
* Detect if the current file position fits in a long int.
*/
static __inline bool
__long_overflow(off_t pos)
{
return (pos < LONG_MIN) || (pos > LONG_MAX);
}